// Copyright 2016-2017 Authors of Cilium
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package client

import (
	"github.com/cilium/cilium/api/v1/client/endpoint"
	"github.com/cilium/cilium/api/v1/models"
	"github.com/cilium/cilium/pkg/api"
	pkgEndpointID "github.com/cilium/cilium/pkg/endpoint/id"
	"github.com/cilium/cilium/pkg/labels"
)

// EndpointList returns a list of all endpoints
func (c *Client) EndpointList() ([]*models.Endpoint, error) {
	resp, err := c.Endpoint.GetEndpoint(nil)
	if err != nil {
		return nil, Hint(err)
	}
	return resp.Payload, nil
}

// EndpointGet returns endpoint by ID
func (c *Client) EndpointGet(id string) (*models.Endpoint, error) {
	params := endpoint.NewGetEndpointIDParams().WithID(id).WithTimeout(api.ClientTimeout)
	resp, err := c.Endpoint.GetEndpointID(params)
	if err != nil {
		/* Since plugins rely on checking the error type, we don't wrap this
		 * with Hint(...)
		 */
		return nil, err
	}
	return resp.Payload, nil
}

// EndpointCreate creates a new endpoint
func (c *Client) EndpointCreate(ep *models.EndpointChangeRequest) error {
	id := pkgEndpointID.NewCiliumID(ep.ID)
	params := endpoint.NewPutEndpointIDParams().WithID(id).WithEndpoint(ep).WithTimeout(api.ClientTimeout)
	_, err := c.Endpoint.PutEndpointID(params)
	return Hint(err)
}

// EndpointPatch modifies the endpoint
func (c *Client) EndpointPatch(id string, ep *models.EndpointChangeRequest) error {
	params := endpoint.NewPatchEndpointIDParams().WithID(id).WithEndpoint(ep).WithTimeout(api.ClientTimeout)
	_, err := c.Endpoint.PatchEndpointID(params)
	return Hint(err)
}

// EndpointDelete deletes endpoint
func (c *Client) EndpointDelete(id string) error {
	params := endpoint.NewDeleteEndpointIDParams().WithID(id).WithTimeout(api.ClientTimeout)
	_, _, err := c.Endpoint.DeleteEndpointID(params)
	return Hint(err)
}

// EndpointLogGet returns endpoint log
func (c *Client) EndpointLogGet(id string) (models.EndpointStatusLog, error) {
	params := endpoint.NewGetEndpointIDLogParams().WithID(id).WithTimeout(api.ClientTimeout)
	resp, err := c.Endpoint.GetEndpointIDLog(params)
	if err != nil {
		return nil, Hint(err)
	}
	return resp.Payload, nil
}

// EndpointHealthGet returns endpoint healthz
func (c *Client) EndpointHealthGet(id string) (*models.EndpointHealth, error) {
	params := endpoint.NewGetEndpointIDHealthzParams().WithID(id).WithTimeout(api.ClientTimeout)
	resp, err := c.Endpoint.GetEndpointIDHealthz(params)
	if err != nil {
		return nil, Hint(err)
	}
	return resp.Payload, nil
}

// EndpointConfigGet returns endpoint configuration
func (c *Client) EndpointConfigGet(id string) (*models.EndpointConfigurationStatus, error) {
	params := endpoint.NewGetEndpointIDConfigParams().WithID(id).WithTimeout(api.ClientTimeout)
	resp, err := c.Endpoint.GetEndpointIDConfig(params)
	if err != nil {
		return nil, Hint(err)
	}
	return resp.Payload, nil
}

// EndpointConfigPatch modifies endpoint configuration
func (c *Client) EndpointConfigPatch(id string, cfg *models.EndpointConfigurationSpec) error {
	params := endpoint.NewPatchEndpointIDConfigParams().WithID(id).WithTimeout(api.ClientTimeout)
	if cfg != nil {
		params.SetEndpointConfiguration(cfg)
	}

	_, err := c.Endpoint.PatchEndpointIDConfig(params)
	return Hint(err)
}

// EndpointLabelsGet returns endpoint label configuration
func (c *Client) EndpointLabelsGet(id string) (*models.LabelConfiguration, error) {
	params := endpoint.NewGetEndpointIDLabelsParams().WithID(id).WithTimeout(api.ClientTimeout)
	resp, err := c.Endpoint.GetEndpointIDLabels(params)
	if err != nil {
		return nil, Hint(err)
	}
	return resp.Payload, nil
}

// EndpointLabelsPut modifies endpoint label configuration
// add: List of labels to add and enable. If the label is an orchestration
// system label which has been disabled before, it will be removed from
// the disabled list and readded to the orchestration list. Otherwise
// it will be added to the custom label list.
//
// delete: List of labels to delete. If the label is an orchestration system
// label, then it will be deleted from the orchestration list and
// added to the disabled list. Otherwise it will be removed from the
// custom list.
//
func (c *Client) EndpointLabelsPatch(id string, toAdd, toDelete models.Labels) error {
	currentCfg, err := c.EndpointLabelsGet(id)
	if err != nil {
		return err
	}

	userLbl := labels.NewLabelsFromModel(currentCfg.Status.Realized.User)
	for _, lbl := range toAdd {
		lblParsed := labels.ParseLabel(lbl)
		if _, found := userLbl[lblParsed.Key]; !found {
			userLbl[lblParsed.Key] = lblParsed
		}
	}
	for _, lbl := range toDelete {
		lblParsed := labels.ParseLabel(lbl)
		delete(userLbl, lblParsed.Key)
	}
	currentCfg.Spec.User = userLbl.GetModel()

	params := endpoint.NewPatchEndpointIDLabelsParams().WithID(id).WithTimeout(api.ClientTimeout)
	_, err = c.Endpoint.PatchEndpointIDLabels(params.WithConfiguration(currentCfg.Spec))
	return Hint(err)
}
